Chill for casting car-wheels



' J. N. BARR.

r Chill for Casting Car Wheels. No, 233,315.

Patented Oct, 19, I880.

N- PETERS, PNOTOJJTNOGHAPHER. WASMINGLON, D, C,

UNITED STATES PATENT OFFICE.

CHILL FOR CASTlNG CAR-WHEELS.

SPECIFICATION forming part of Letters Patent No. 233,315, dated October 19, 1880.

Application filed October 23, 1879.

To all whom it may concern Be it known that I, JACOB N. BARR, of Altoona, in the county of Blair and State of Pennsylvania, have invented certain new and useful Improvements in Chills for (lasting Gar Wheels; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification, in which-' Figure 1 represents a top-plan View of a portion of a -chill for casting car-wheels to which my improvements have been applied. Fig. 2 reprcsen ts a vertical section of a portion of a flask, showing my improved chill in position, as also a portion of a car-wheel, the latter being shown in dotted lines. Fig. 3 represents an enlarged sectional view of a portion of the chill and the relative positions of the cope and drag.

My invention relates to a new and improved mode of constructing chills used in casting car-Wheels. Heretofore such chills have been constructed of a single ring of metal, which either presented a plain unbroken chillingsurface to the molten metal or the chilling-surface was broken by cuts or recesses formed perpendicularly to the plane of the chill.

In practice I have found it desirable, in order to secure the bestdistribution of the white or chilled ironin the chilled surface of the wheel, to provide some means by which the depth of the white iron could be-regulated or modified at any desired zone of the chilled surface. To effect this object one or more series of openings must be pierced in the peripheral face of the chill, or one or more circular receptacles be formed in the face of the chill, for the reception of sand or other non-conducting material, and said openings or receptacles vented by a series of openings connecting with them at the rear and passing through the body of the chill to the outer air for the passage and escape of the gases. 7

Heretofore solid chills for casting car-wheels have been made in which were formed, on their ehilling-faceand at or near the flange of the wheel, a sand-receptacle and a series of venti latin g-openin gs, which communicated atdifferent points with the rear of said receptacle and led to the outer air through the body of said chill for the passage and escape of the gases. To form a chill in this manner is a very costly and tedious afl'air, to remedy which is the ob ject of niyinvention, and which consists in forming the chill of two or more rings so constructed and put together as to afford at once the means for receiving the sand or its equivalent at the desired points or in the desired zones along the chilled surface of the wheel, in order to modify the depth of the chill, as also the necessary channels for the exit of gases generated by contact with the molten metal and the sand, thereby destroying all tendency on the part of the gas to pass inwardly, and thus disturb the molten metal andimpair the value ofthe wheel.

To enable others skilled in the art to make, construct, and use my improvement, I will now proceed to describe it in detail, omitting a particular description of such parts of the chill as are old and well known in the art.

In the accompanying drawings I have represented a chill composed of four rings so constructed and put together as to form three separate and distinct receptacles for the reception of sand to modify the depth of the chilling; but it may be composed of but two rings, or three rings, or even more than four.

A, B, (J, and D represent the four rings comprising the chill illustrated in the drawings. Between A and B, on the chilling-face of the chill, is formed a circular groove, a, for the reception of sand, with the view of modifying the depth of the chill at the flange of the wheel.

b represents the openings for the passage of the gases from the groove a to the outer air, and which I prefer should find its vent on the outside of the drag and cope instead of through the latter.

0 0 represent projections formed on the ring A, and are interposed between the latter and the ring B, and thus form the openings 1) for the escape of the gases. Between rings B and C is formed a similar circular groove or receptacle, a, for the reception of sand, as also openings b, for the venting of the gas, and which are formed by projections e in the same manner as the last, it only (littering from the latter in that the vent-openin gs pass straight through from the sand-groove to the outer periphery of the chill. A similar sand-groove, a, and vent-openings b are formed between the ringsCand 1). Thus made, each of these rings can be cast separately, thereby saving the cost of boring out the vent-openings.

As a rule the chill will be made in two rings, of which A will form one, and the rings B, U, and D the other; but with some kinds of iron it will be advisable to use two or more grooves, a-, for the reception of sand to toughen the metal, and thus prevent scaling or shelling out, as also the forming of chill-cracks.

In the drawings, E represents the cope; and F the drag, which make up the flask, while G represents, in dotted lines, the position of the wheel when cast.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

A car-wheel chill composed of two or more rings, between which are formed, according to the number of rings, one or more receptacles for non-condueting material, and vent-openin gs leading therefrom, substantially as and for the purpose set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 29th day of September, 1879.

J AGOB N. BARR.

Witnesses A. S. VOGT, E. W. Moaaow. 

